TOKYO -- If you have ever wondered how fast 400-meter runners are moving, the about-to-open Tokyo Olympics will offer a clue. Real time speed will be displayed during the TV broadcasts.
Tokyo 2020 Olympics
It's all in the wrist: Sports tech blossoms at Tokyo Olympics
From military-grade radar to Swiss-precision cameras, Games will be cutting edge
Down to the millimeter: Sports technology has revolutionized how athletes train and perform. © Reuters
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